trewent



No. 622,090. Patented Mar. 28, I899.

F. J. TREWENT & W. E. PHOCTOR.

PLUG COCK FOR ASH EJECTORS.

(Application filed Oct. 10, 1898.)

(No Model.) 2 Sheets-8heet l.

Q/vi/bvwaaco Q 7w? 16.1 0.9015.;

No. 622,090. I Patented Mar.- 28, I899.

' F. J. TBEWENT & W. E. PRUCTOR.

PLUG COCK FOR ASH EJECTORS.

(Application filed Oct. 10, 1898.) (No Model.) 2 Sheets-Sheet 2..

w: Npams PETERS co. mom-1.1mm. msmwcrcu. n

Nirnn men.

PATENT FRANCIS JAMES TREWENT AND IVILLIAM EDWARD PROCTOR, OF LONDON, ENGLAND, AS SIGNORS TO HORACE SEE, OF NEIV YORK, N. Y.

PLUG-000K FOR ASH-EJECTORS'.

'srncxrroa'rron forming part of Letters Patent No. 622,090, dated March 28, 1899.

Application filed October 10, l 8 9 8.

To all whom it may concern.-

Be it known that we, FRANCIS J AMEs- TEE WENT and WILLIAM EDWARD PRooToR, subjects of the Queen of Great Britain, and residents of the city of London, England, have. made a certain new and useful Improvement in Plug-Cocks for Hydraulic Ash-Ejeotors and other Apparatus, of which the following is a specification.

The invention relates to plug-cocks,and has for its object an improved construction thereof more particularly adapted for use in the ejector-pipes of hydraulic ash-ejectors,wherein ashes are elevated by means of jets of water injected into suitable ducts or tubes. When an ordinary valve or cock is employed in the ejector-pipe of such an apparatus and the valve is closed with more or less suddenness, a water-hammer action is produced, which results in jarring the pipes and straining or starting the joints of the connection.

Our present invention has for its object an improved construction of plug-cock which can be closed suddenly without the production of such water-hammer, and hence without the injurious results attendant thereupon.

Our invention consists in the construction of the cock, as more particularly hereinafter set forth and'claimed.

In the accompanying drawings, Figure 1 is a vertical section of our ash-ejector plug-cock. Fig. 2 is a bottom view with lever H removed. Fig. 3 is a horizontal section on the line 3 3 of Fig. 1. Fig. 4 is a side elevation of the plug D, the lower portion of said plug being broken away. Fig. 5 is a bottom view of plug D, showing the lever H in place.

Similar letters of reference indicate like parts.

A is the body of the ejector pipe or nozzle, the escape-orifice being at B and the direc tion of the liquid forced through it being indicated by the arrow C. The bore of the nozzle is preferably made conical or tapering, as shown. Seated in the body A is a plug D, which has a tubular extension F and is re tained in its place in the body A by the stuffing-box (I. Secured in place on said tubular extension by means of the clamping-bolt I is the lever II. In plug D there is the usual transverse passage-way E for the liquid,which Serial No. 693,171. (No model.)

when the plug is appropriately turned, as

shown in Fig. 1, allows of direct passage of water through it to the delivery-orifice B. In

the plug and communicating with the passage-way E are two openings, one of which is represented at T, Fig. 4, and is made in the closing side or wall of the plug. Hence when the plug is turned so as to bring the passageway E transversely the conduit the liquid -moving in the direction of the arrow 0 will 'On the stem K is a collar 0, against which bears one end of the spiral spring N, inclosing the valve-stem, the other end of said spring bearing against the sleeve J.

On the valve L is an extension U, which enters the opening M. The valve is therefore guided by said extension and by the entrance of its stem K into the pipe I 'f In the valve L are openings P, communicating with the interior of its-stem K, and surrounding the valve is a packing-ring V.

The extent of opening of the plug is'controlled by a stop Q, which is received in a segmental opening R in the end of said plug, as indicated in Figs. 1 and 3.

The operation of the device is a follows: When the plug is opened, as shown in Fig. 1, the water passes freely through the passageway E and escapes at the nozzle B, the valve L being then held to its seat by the spring N, so closing the opening M. When the plug is turned by means of lever H, so as to bring the passage-way E transversely the conduit in the valve-body, thus cutting off the flow to nozzle B, the water instead of impinging violently against the wall of the plug enters the passage-way E through the lateral opening T, and thence passes to the opening M, where by its force of impact it will move the valve L against the resistance of spring N away from its seat. The flow will then be prevented from passing into that part of the tubular extension F which containsv the spring N by the packing-ring V and will proceed through the openings P in the valve through the tubular valve-stem K to the escape-pipe K. The momentum of the water being expended in forcing open the valve against the spring N will be sufficiently reduced when a small amount has escaped to permit the spring to react and carry the valve back to its seat. As a consequence the moving body of Water will be brought to rest gradually and without jar, noise, or water-hammer.

The object of preventing the water coming into contact with the spring N is to protect the latter from becoming-rusted and clogged.

Ve claim- 1. In combination with a pipe, duct or conduit, a plug or cook therein having a transverse passage and a relief-opening communicating with said passage, and a spring-controlled valve constructed to close said reliefopening until a given fluid-pressure within said passage is reached, substantially as described.

2. In combination with a pipe duct or conduit, a plug or cook therein having a transverse passage, and in its wall a lateral aperture through which the fluid may enter said passage when said cock is placed to cut off the flow, and a relief-opening through which the fluid so entering may escape and a springcontrolled valve constructed to close said relief-opening until a given fluid-pressu re within said passage is reached, substantially as described.

In combination with a pipe duct orcon duit, a rotatable plug or cock therein, means for rotating said plug to open or close said conduit, the said plug having a transverse passage and in its wall a lateral aperture through which the fluid may enter said passage when said cock is placed to cut off the flow, and a relief-opening through which the fluid so entering may escape and a springcontrolled valve constructed to close said relief-opening until a given fluid-pressure within said passage is reached, substantially as described.

4. In combination with a pipe duct or conduit, the cock or plug D having tubular extensions F, and a relief-opening M between said extension and the passage-way for the fluid in said plug, and a spring-controlled valve seated in said tubular extension and constructed to close said opening M until a predetermined pressure shall have been reached, substantially as described.

5. In combination with the body portion A, the plug D having a transverse passage-way E and openings T and M in the wall thereof, and also the tubular extension F, the springcontrolled valve L seated in said opening M and provided with apertures P, and the tubular valve-stem K communicating with said apertures, substantially as described.

FRANCIS JAMES TREWENT. VILLIAM EDWARD PROOTOR.

\Vitnessesz- FRANCIS W. FRIGOUT, II. D. J AMESON. 

